Let me encourage you. Young children soak in everything we say to them. Don’t be frustrated if they’re not reciting the catechism by the age of 4. Don’t be frustrated if they seem to be disinterested when you pray. Don’t be frustrated by their lack of attention span.
Our son has learned the Apostles’ Creed, the Lord’s Prayer, and other Psalms merely through repeating certain prayers each night. No, we have not tested his memory or promised him certain rewards for praying fervently. Mere repetition does it all.
HT: Tim Challies